What is Poly Ferric Sulfate CAS 35139-28-7?

Poly Ferric Sulfate, commonly called PFS or SPFS, is a pre-polymerized ferric sulfate coagulant used mainly in water and wastewater treatment. The CAS number 35139-28-7 identifies the polymerized ferric sulfate material, which is generally represented by the variable formula [Fe2(OH)n(SO4)3-n/2]m rather than one fixed molecular formula.

How does PFS differ from ordinary ferric sulfate CAS 10028-22-5?

Ordinary ferric sulfate is the simple iron(III) sulfate salt, while PFS is a pre-polymerized ferric coagulant. Because PFS already contains polymeric ferric species, it often forms larger, denser flocs, can work over a useful pH range, and may require a lower dosage than conventional ferric or aluminum coagulants.

What is Poly Ferric Sulfate used for in water treatment?

It is used as a coagulant and flocculant for drinking-water clarification, surface-water treatment, municipal sewage treatment, industrial wastewater treatment, phosphorus removal, and sludge conditioning. The product helps remove suspended solids, turbidity, color, and phosphate through charge neutralization and bridging flocculation.

What forms and typical specifications should be checked for PFS?

PFS is commonly supplied as a reddish-brown liquid or as a yellowish to brown solid powder or granular product. Commercial specifications vary, so confirm physical form, total iron content, basicity, pH, density or bulk properties, water-insoluble matter, and any application-specific limits before ordering.

How should Poly Ferric Sulfate be stored and dosed?

Store it in tightly closed, corrosion-resistant containers in a cool, dry, well-ventilated area away from direct sunlight and alkalis. Because PFS solutions are acidic, use acid-compatible dosing equipment and determine the optimum dose by jar testing; avoid mixing directly with alkaline chemicals before dilution.

Poly Ferric Sulfate (PFS) CAS 35139-28-7

Poly Ferric Sulfate, also called polyferric sulfate, polymerized ferric sulfate or PFS, CAS 35139-28-7, is an inorganic polymer coagulant supplied as a solution or solid and positioned for water and wastewater treatment. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 35139-28-7
Synonyms: Polyferric Sulfate; Polymerized Ferric Sulfate; PFS
Grade: Industrial grade (water treatment use)
Package: Standard export packaging

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Product Description

Poly Ferric Sulfate (PFS) CAS 35139-28-7 is a pre-polymerized ferric sulfate coagulant represented by the variable formula [Fe2(OH)n(SO4)3-n/2]m.

Synonyms: Polyferric Sulfate; Polymerized Ferric Sulfate; PFS.

CAS: 35139-28-7.

It is supplied as a reddish-brown liquid or a yellowish to brown solid powder or granular product.

It is positioned as an inorganic polymer coagulant for water and wastewater treatment.

It promotes rapid flocculation and effective removal of suspended solids and contaminants.

It is used for drinking-water clarification and surface-water treatment.

It is used for municipal sewage and industrial wastewater treatment, including phosphorus removal.

It is used for sludge conditioning and dewatering processes.

It often forms larger, denser flocs than conventional ferric or aluminum coagulants and may require a lower dosage.

Its solutions are acidic, so acid-compatible dosing equipment should be used and direct mixing with alkaline chemicals avoided before dilution.

Confirm the required form, total iron content, basicity, pH, and related specifications for the chosen grade.

Check compatibility with the target treatment process and confirm the optimum dose by jar testing.

Store in tightly closed, corrosion-resistant containers in a cool, dry, well-ventilated area, away from direct sunlight and alkalis.

For solid products, protect from moisture; for liquid products, prevent contamination or evaporation.

Confirm packaging suitable for the liquid or solid form and order quantity, and follow the current SDS.

Confirm grade, packaging, and specification as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Poly Ferric Sulfate CAS 35139-28-7?

A: Poly Ferric Sulfate, commonly called PFS or SPFS, is a pre-polymerized ferric sulfate coagulant used mainly in water and wastewater treatment. The CAS number 35139-28-7 identifies the polymerized ferric sulfate material, which is generally represented by the variable formula [Fe2(OH)n(SO4)3-n/2]m rather than one fixed molecular formula.
Q:
How does PFS differ from ordinary ferric sulfate CAS 10028-22-5?

A: Ordinary ferric sulfate is the simple iron(III) sulfate salt, while PFS is a pre-polymerized ferric coagulant. Because PFS already contains polymeric ferric species, it often forms larger, denser flocs, can work over a useful pH range, and may require a lower dosage than conventional ferric or aluminum coagulants.
Q:
What is Poly Ferric Sulfate used for in water treatment?

A: It is used as a coagulant and flocculant for drinking-water clarification, surface-water treatment, municipal sewage treatment, industrial wastewater treatment, phosphorus removal, and sludge conditioning. The product helps remove suspended solids, turbidity, color, and phosphate through charge neutralization and bridging flocculation.
Q:
What forms and typical specifications should be checked for PFS?

A: PFS is commonly supplied as a reddish-brown liquid or as a yellowish to brown solid powder or granular product. Commercial specifications vary, so confirm physical form, total iron content, basicity, pH, density or bulk properties, water-insoluble matter, and any application-specific limits before ordering.
Q:
How should Poly Ferric Sulfate be stored and dosed?

A: Store it in tightly closed, corrosion-resistant containers in a cool, dry, well-ventilated area away from direct sunlight and alkalis. Because PFS solutions are acidic, use acid-compatible dosing equipment and determine the optimum dose by jar testing; avoid mixing directly with alkaline chemicals before dilution.

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